Module with quick breaking capacity

Abstract

The utility model relates to a module with quick breaking capacity, which comprises a plurality of groups of battery units, and a positive pole and a negative pole are arranged at the top of each battery unit; the battery further comprises a quick-break pole piece, the quick-break pole piece is connected with the positive electrode and the negative electrode of at least one group of battery units, and the quick-break pole piece is provided with a plurality of fusing parts which are used for improving the overcurrent capacity of the quick-break pole piece. When a short circuit occurs inside or outside the battery and the current is huge, the fusing part is rapidly heated due to high sensitivity and is instantly fused, so that a current loop is blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a module with a fast-break capability. Background Art

[0002] As global climate change and environmental problems become increasingly serious, new energy vehicles have become the trend of future travel. New energy vehicles use non-traditional fuels such as electricity and hydrogen, which significantly reduces dependence on oil resources. At the same time, the exhaust emissions of this type of vehicle are zero, which can effectively reduce greenhouse gas emissions and have positive significance for alleviating global warming. New energy vehicles produce almost no noise during driving, reducing urban noise pollution. Since the exhaust emissions are zero, the pollution to the atmosphere is also greatly reduced, which helps to improve the air quality in the city. The energy utilization efficiency of new energy vehicles is much higher than that of traditional fuel vehicles. The conversion efficiency of electric energy or hydrogen is as high as 80% or more. In contrast, the conversion efficiency of fuel is only about 30%. This means that under the same fuel or energy consumption, new energy vehicles can provide longer driving range and higher energy utilization efficiency. Batteries, as the power source of new energy vehicles, are the core component of new energy vehicles. With the promotion and popularization of new energy vehicles, it is easy to cause battery abuse. Fire accidents caused by overcurrent and short circuit are endless, which directly endanger personal safety. Therefore, the safety of the power battery system cannot be ignored.

[0003] Patent application number: 202321546374.4, application date: June 16, 2023, utility model name: A laminated battery with an anti-short circuit structure, including a metal shell, an insulating layer is fixedly connected to the inner wall of the metal shell, the inner wall of the insulating layer is equipped with a fixed sleeve, the inner wall of the fixed sleeve is movably connected to a battery pack, the battery pack is composed of six small batteries of the same specification connected in series, a conductive structure is fixedly connected to the battery pack, and a protective structure is provided inside the conductive structure. When the battery pack is damaged and leaks or there is an external current transmission device, the electromagnet is energized to generate magnetic force to attract the iron plate, and the spring wire extends forward under the suction force of the electromagnet on the iron plate, so that the electromagnet is connected to the iron plate, and the current of the metal shell is introduced into the fuse through the wire. The fuse current increases, the temperature rises and melts, blocking the current circuit, and the battery pack will no longer be able to output current, which solves the problem that the battery can still output current when short-circuited, causing the battery to generate a lot of heat in a short time, which is prone to fire.

[0004] In the prior art, when a short circuit occurs inside a battery, the spring wire in the protective structure is stretched to connect the electromagnet to the iron plate, and the current eventually passes through the fuse. The disadvantage is obvious: when the current is weak or the spring is aged, although the current passes through the electromagnet to form a suction force on the iron plate, the electromagnet cannot be connected to the iron plate, and the current cannot form a path.

[0005] In addition, when the battery is short-circuited externally, the prior art provides an insulating tube so that the current cannot reach the fuse, thereby failing to block the current loop. Utility Model Content

[0006] Aiming at the defects in the prior art that a short circuit occurs inside the battery, the electromagnet and the iron plate cannot be connected due to weak current or aging of the spring, so that the current cannot form a path; and a short circuit occurs outside the battery, because the insulating tube is set so that the current cannot reach the fuse, thereby failing to block the current loop, the purpose of the utility model is to provide a module with quick-break capability.

[0007] The technical solution provided by the utility model is:

[0008] A module with quick-break capability comprises a plurality of battery cells, each battery cell having a positive pole and a negative pole arranged on the top; and a quick-break pole piece connected to the positive and negative poles of at least one group of battery cells; the quick-break pole piece is provided with a plurality of fuse parts for increasing the current carrying capacity of the quick-break pole piece.

[0009] Preferably, the quick-acting electrode piece is provided with a plurality of through holes; the through holes correspond to the positive and negative electrodes of the battery unit, and the thickness of the fuse portion is smaller than that of other parts of the quick-acting electrode piece.

[0010] Preferably, it further comprises a plurality of bus bars connecting the positive poles or negative poles of the battery cells adjacent to each other; the plurality of bus bars form an electrical connection between the adjacent battery cells and are located on both sides of the quick-break electrode.

[0011] Preferably, at least one of the fast-acting electrodes is provided with a temperature sensor; the temperature sensor is connected to the battery management system via a low-voltage collection harness.

[0012] Preferably, it also includes a fixing member for fixing a plurality of battery cell groups; a plate with a plurality of limiting grooves is provided on the top of the module composed of the plurality of battery cell groups; and the plate is movably connected to the fixing member.

[0013] Preferably, the bus bar, the quick-break pole piece and the limiting groove of the plate are adapted; and the low-voltage collection harness is installed in another limiting groove.

[0014] Preferably, the fixing member comprises a pair of end fixing members and a binding strap; the length of the end fixing member is consistent with the length of a group of battery cells; there are at least two binding straps, which are wound around a module consisting of the end fixing members and a plurality of groups of battery cells.

[0015] Preferably, the end fixing piece is provided with a groove; and the binding strap is adapted to the groove.

[0016] Preferably, the binding strap is made of elastic material and has a thickness of 1 cm to 2 cm.

[0017] Preferably, the fast-acting pole piece is made of copper or aluminum and has a thickness of 1 mm to 2 mm.

[0018] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0019] The utility model connects the positive and negative electrodes of at least one group of battery cells with quick-break pole pieces, and arranges a plurality of fuse parts side by side on the quick-break pole pieces. When a short circuit occurs inside or outside the battery and a huge current flows, the fuse parts are highly sensitive and quickly heat up, and the fuse parts are instantly melted, thereby blocking the current loop.

[0020] In addition, at least one quick-acting electrode is provided with a temperature sensor, which is connected to the battery management system through a low-voltage collection harness. When a module composed of several groups of battery cells is overloaded and the current is too large, the quick-acting electrode heats up accordingly, and the temperature sensor promptly feeds back the temperature to the battery management system. When the temperature reaches the threshold, the battery management system will send out a signal to reduce the power demand, thereby protecting the module composed of several groups of battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a module with fast-break capability in one embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of a group of battery unit structures in one embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the overall structure of a module with fast-break capability from another perspective in one embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of a plate structure with a plurality of limit grooves in an embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of the structure of a fast-acting pole piece in an embodiment of the present application.

[0026] Explanation of the symbols in the schematic diagram:

[0027] Battery unit 1, positive pole 11, negative pole 12; fixing piece 2, end fixing piece 21, binding band 22; bus bar 3; fast-acting pole piece 4, fuse part 41, through hole 42; temperature sensor 5; plate 6; low-voltage collection harness 7. DETAILED DESCRIPTION

[0028] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0029] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0030] Example 1

[0031] The advantages of new energy vehicles in market demand, technological progress and other aspects make their development prospects and trends very optimistic. With the continuous increase in purchasing support, technological progress and intensified market competition, the new energy vehicle market will usher in a broader development space. As the power source and core component of new energy vehicles, batteries need to pay special attention to whether they have safety hazards, because if they are not careful, they will directly threaten the lives of people in the car.

[0032] Therefore, whether an overload or short circuit occurs outside or inside the battery, the battery needs to be powered off immediately to protect the entire system.

[0033] In this embodiment, the present application proposes a module with fast disconnect capability, such as Figure 2 As shown, it includes several groups of battery cells 1, each group includes at least two battery cells 1 arranged side by side, and each battery cell 1 is provided with a positive electrode column 11 and a negative electrode column 12 on the top; Figure 1 , Figure 3 As shown, the fixing member 2 includes a pair of end fixing members 21 and at least two straps 22. The end fixing member 21 is provided with a groove, and the width and depth of the groove are adapted to the width and depth of the strap 22. The length of the end fixing member 21 is the same as the length of a group of battery cells 1 arranged side by side, and is used to fix a group of battery cells 1. The strap 22 is wound around the end fixing member 21 and a module composed of several groups of battery cells 1, and is used to bundle the module composed of several groups of battery cells 1 into a whole. Preferably, the strap 22 is made of elastic material, such as rubber.

[0034] like Figure 1 As shown, the bus bar 3 connects the positive poles 11 or negative poles 12 of the battery cells 1 adjacent to each other to form an electrical connection between the adjacent battery cells 1; Figure 5As shown, the quick-acting pole piece 4 connects the positive and negative poles of at least one group of battery cells 1, and is provided with a plurality of fuses 41 arranged side by side. The fuses 41 are used to increase the current capacity of the quick-acting pole piece 4. Preferably, the quick-acting pole piece 4 is made of copper or aluminum with a thickness of 1 mm to 2 mm. When a short circuit occurs inside or outside the battery, the current is huge, and the fuse 41 is highly sensitive and rapidly heats up, and is instantly melted, thereby blocking the current loop; the fuse 41 may be slot-shaped or hole-shaped, and may be rectangular or circular. Preferably, the fuse 41 is a plurality of circular holes arranged side by side; the bus bar 3 is located on both sides of the quick-acting pole piece 4.

[0035] Example 2

[0036] In this embodiment, the present application proposes a module with fast disconnect capability, such as Figure 2 As shown, it includes several groups of battery cells 1, each group includes at least two battery cells 1 arranged side by side, and each battery cell 1 is provided with a positive electrode column 11 and a negative electrode column 12 on the top; Figure 1 , Figure 3 As shown, the fixing member 2 includes a pair of end fixing members 21 and at least two straps 22. The end fixing member 21 is provided with a groove, and the width and depth of the groove are adapted to the width and depth of the strap 22. The length of the end fixing member 21 is the same as the length of a group of battery cells 1 arranged side by side, and is used to fix a group of battery cells 1. The strap 22 is wound around the end fixing member 21 and a module composed of several groups of battery cells 1, and is used to bundle the module composed of several groups of battery cells 1 into a whole. Preferably, the strap 22 is made of elastic material, such as rubber.

[0037] like Figure 1 As shown, the bus bar 3 connects the positive poles 11 or negative poles 12 of the battery cells 1 adjacent to each other to form an electrical connection between the adjacent battery cells 1; Figure 5 As shown, the quick-acting pole piece 4 connects the positive and negative poles of at least one group of battery cells 1, and is provided with a plurality of fuses 41 arranged side by side. The fuses 41 are used to increase the current capacity of the quick-acting pole piece 4. Preferably, the quick-acting pole piece 4 is made of copper or aluminum with a thickness of 1 mm to 2 mm. When a short circuit occurs inside or outside the battery, the current is huge, and the fuse 41 is highly sensitive and rapidly heats up, and is instantly melted, thereby blocking the current loop; the fuse 41 may be slot-shaped or hole-shaped, and may be rectangular or circular. Preferably, the fuse 41 is a plurality of circular holes arranged side by side; the bus bar 3 is located on both sides of the quick-acting pole piece 4.

[0038] like Figure 1As shown, at least one quick-acting electrode 4 is provided with a temperature sensor 5, and the temperature sensor 5 is connected to the battery management system through a low-voltage collection harness 7. When a module composed of several groups of battery cells 1 is overloaded and the current is too large, the quick-acting electrode 4 heats up accordingly, and the temperature sensor promptly feeds back the temperature to the battery management system. When the temperature reaches the threshold, the battery management system will send out a signal to reduce the power demand, thereby protecting the module composed of several groups of battery cells 1.

[0039] In addition, if Figure 4 As shown, it also includes a plate 6 with a plurality of limit grooves, which is arranged at the top of a module composed of a plurality of battery cells 1 and does not exceed the module boundary; the bus bar 3 and the quick-break electrode 4 are adapted to the limit grooves of the plate 6, and the low-voltage collection harness 7 is placed in another limit groove. The plate 6 separates the components through the plurality of limit grooves to avoid mutual influence of the components. The plate 6 and the end fixing member 21 are movably connected, preferably, movably connected by a snap-fit ​​method.

[0040] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A module with fast-break capability, comprising: A plurality of groups of battery cells (1), each battery cell (1) being provided with a positive electrode column (11) and a negative electrode column (12) on the top; Features: Also includes, A quick-acting pole piece (4) is connected to the positive and negative poles of at least one group of battery cells (1); the quick-acting pole piece (4) is provided with a plurality of fuse parts (41) for increasing the current-carrying capacity of the quick-acting pole piece (4).

2. A module with fast-break capability according to claim 1, characterized in that: The quick-acting electrode piece (4) is provided with a plurality of through holes (42); the through holes (42) correspond to the positive and negative electrodes of the battery unit (1); and the thickness of the fuse portion (41) is smaller than other parts of the quick-acting electrode piece (4).

3. The module with fast-break capability according to claim 1, characterized in that: It also includes a plurality of bus bars (3) connecting the positive poles (11) or negative poles (12) of adjacent battery cells (1); the plurality of bus bars (3) form an electrical connection between adjacent battery cells (1) and are located on both sides of the quick-break electrode piece (4).

4. A module with fast-break capability according to claim 3, characterized in that: At least one of the quick-break pole pieces (4) is provided with a temperature sensor (5); the temperature sensor (5) is connected to a battery management system via a low-voltage collection harness (7).

5. A module with fast-break capability according to claim 4, characterized in that: It also comprises a fixing member (2) for fixing a plurality of groups of battery cells (1); a plate member (6) with a plurality of limit grooves is provided on the top of the module composed of the plurality of groups of battery cells (1); and the plate member (6) is movably connected to the fixing member (2).

6. A module with fast-break capability according to claim 5, characterized in that: The bus bar (3) and the quick-break pole piece (4) are adapted to the limiting groove of the plate (6); and the low-voltage collection harness (7) is installed in another limiting groove.

7. The module with fast-break capability according to claim 5, characterized in that: The fixing member (2) comprises a pair of end fixing members (21) and a binding band (22); the length of the end fixing members (21) is consistent with the length of a group of battery cells (1); there are at least two binding bands (22) which are wound around a module consisting of the end fixing members (21) and a plurality of groups of battery cells (1).

8. A module with fast-break capability according to claim 7, characterized in that: The end fixing piece (21) is provided with a groove; the binding belt (22) is adapted to the groove.

9. A module with fast-break capability according to claim 8, characterized in that: The binding belt (22) is made of elastic material and has a thickness of 1 cm to 2 cm.

10. The module with fast-break capability according to claim 1, characterized in that: The fast-acting pole piece (4) is made of copper or aluminum and has a thickness of 1 mm to 2 mm.

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